@Olof suggested to make a thread for suggestions that are too small to have a separate topic.
Community can suggest small details in graphics or game ideas here. Try to make only small suggestions/Questions.

Our new Aircraft BAe 146 has almost 100 PAX. My suggestion for the next aircraft in the game is The Concorde which is also 100pax. It would be interesting to have atleast one super popular plane in the first release.

I have one question and idea too… Will the game be able to find flaws in security system similar to that of Prison Architect??? If not addressed quickly, the flaws could be used for attacks,etc.(similar to escapes and riots in PA)

Objects in your building slowly deteriorate over time and their upkeep should increase over time. For example after a few years a lounge sofa will have become tatty and not very nice for customers to sit on. There could be a slider value that suggests how tatty stuff is before it is replaced and an option to say it’s never replaced. This adds a bit of challenge to managing your budget as, although you have to build the airport, you also have to maintain the airport which can either happen manually or if you’re close to bankruptcy you might have to turn it off and renew and repair things manually.

It won’t be realistic to have Concorde flights in the beginning though, as it only served big market airports. I think it’s better to prioritize jets that are seen in a lot of airports before doing the niche, trophy aircraft.